<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [puppeteer](./puppeteer.md) > [Coverage](./puppeteer.coverage.md) > [startCSSCoverage](./puppeteer.coverage.startcsscoverage.md) ## Coverage.startCSSCoverage() method <b>Signature:</b> ```typescript startCSSCoverage(options: { resetOnNavigation?: boolean; }): Promise<void>; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | options | { resetOnNavigation?: boolean; } | | <b>Returns:</b> Promise<void>